Firstly, that's not how you link to URLs, for example [http://www.google.com|Google]. Secondly that site is an illegal* copy of the old O'Reilly CD Bookshelf. Please remove it. Some of the people here wrote those books, all be it a long time ago. Hint, check the date of your sources, it's not 1998 any more. Your references aren't current.

There is nothing to hide your source. Again there's much previous discussion on this site, and elsewhere. Consider the alternatives.

* Yes, I've reporeted this several times over the years, the site in question has dropped off the web at least twice and popped back up again.

The alternatives are discussed at length in other threads I mentioned. You've been here for over a year remember that Super Search is your friend. Again, do some research on reverse engineering. It a Perl only problem.